Have you ever seen rats darting out of storm drains at night in the city? It’s more than just unsettling—it’s a sign of potential flaws in urban sanitation and infrastructure protection. In fact, pests like rats and cockroaches often use drainage systems as hidden passageways into buildings and public spaces. That’s where rodent-proof trench covers come into play as a key solution.

Today, from the perspective of a professional supplier, let’s explore the importance of rodent-proof trench covers, and how innovative applications of FRP and resin concrete can form an effective anti-pest drainage system.

Key Design Features of Rodent-Proof Trench Covers

An ideal rodent-proof drainage cover must balance three critical functions: rodent deterrence, efficient drainage, and structural stability. Designing a cover that meets all three is no small feat and requires thoughtful engineering.

Precision Protection with FRP Grating: Blocking Pests at the Physical Level

FRP (Fiberglass Reinforced Plastic) is gaining popularity in pest-proof designs due to its high strength and precision moldability. You might wonder: “How can you stop something as clever as a rat?” The answer lies in mesh sizing.

Our FRP rodent-proof grating is designed with openings smaller than the average rat shoulder width of 2 cm, physically preventing rodents from squeezing through. At the same time, its hydraulic performance is carefully simulated to ensure water can still flow efficiently through the grid.

Additionally, FRP offers exceptional corrosion resistance and weather durability. Unlike metal or plastic, it won’t degrade under sun, rain, or even rodent gnawing—making it a dependable long-term choice for urban infrastructure.

Airtight FRP Covers: Sealing Off Breeding Grounds

If you’ve ever walked through a night market or near an old drain and noticed heavy rodent activity, you likely know that odor and gaps are two major attractants for pests. That’s why we recommend pairing FRP grating with resin concrete covers.

Resin concrete offers high airtightness and low water absorption, effectively sealing off unpleasant odors that would otherwise lure pests to nest nearby. Its dense, abrasion-resistant structure ensures tight alignment between cover and frame, greatly reducing the chance of rodents slipping through micro gaps.

In a recent installation around a school district in Taipei, we implemented this solution and saw rodent activity reports drop by over 60% in just six months—clear evidence of the role trench covers play in urban hygiene.

Base and System Integration: Total Protection from the Ground Up

Resin Concrete Bases: Eliminate Every Weak Spot

Think of the base as the skeleton of the trench cover. If the base is unstable or poorly built, even the most advanced cover will fail. That’s why we emphasize the use of modular resin concrete bases.

Our bases are designed with high compressive strength and precision assembly, seamlessly fitting with FRP grating. This ensures no displacement or warping, and eliminates any gap that could become a pest entry point. The modular design also makes on-site adjustments fast and efficient.

In a park improvement project in New Taipei City, we applied this complete solution—resin concrete bases combined with rodent-proof grates. The result? A significant reduction in rodent sightings, and positive feedback from local residents about the improved durability and appearance.

Conclusion: Rodent Prevention Is a Foundation of Urban Safety

You may think trench covers are just minor parts of urban infrastructure, but in reality, they serve as the first line of defense for public safety and sanitation. Combining precision FRP grating, airtight resin concrete covers, and reinforced concrete bases results in a system that prevents pests, blocks odor, and protects infrastructure.

All Leader as a professional supplier, we offer more than just products—we provide a complete system, from design and installation to long-term maintenance. If you’re planning to upgrade your drainage infrastructure and improve environmental hygiene, now is the perfect time to reconsider your choice of trench cover materials and designs.

Learn more about our full range of FRP and resin concrete drainage solutions